i have on skype for business(also known as lync) and requirement was same sending a message to all contact list, saying greetings and other i used lync api to do that
skype is same as well
i am a java SE ,EE,C# developer these days i find extra time so i am here freelancing , i assure you once u work with me and then afterwards you will always look for me
WHY u should give me the project ?
because i am free right now and i will start working for u right now and deliver the work as soon as i am done